#!/usr/bin/env python3
# Copyright (c) 2015-2017 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
'''
Test script for security-check.py
'''
import subprocess
import unittest


def write_testcode(filename):
    with open(filename, 'w', encoding="utf8") as f:
        f.write('''
    #include <stdio.h>
    int main()
    {
        printf("the quick brown fox jumps over the lazy god\\n");
        return 0;
    }
    ''')


def call_security_check(cc, source, executable, options):
    subprocess.check_call([cc, source, '-o', executable] + options)
    p = subprocess.Popen(['./security-check.py', executable], stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE, stdin=subprocess.PIPE, universal_newlines=True)
    (stdout, stderr) = p.communicate()
    return (p.returncode, stdout.rstrip())


class TestSecurityChecks(unittest.TestCase):
    def test_ELF(self):
        source = 'test1.c'
        executable = 'test1'
        cc = 'gcc'
        write_testcode(source)

        self.assertEqual(call_security_check(cc, source, executable, ['-Wl,-zexecstack', '-fno-stack-protector', '-Wl,-znorelro', '-no-pie', '-fno-PIE']),
                         (1, executable + ': failed PIE NX RELRO Canary'))
        self.assertEqual(call_security_check(cc, source, executable, ['-Wl,-znoexecstack', '-fno-stack-protector', '-Wl,-znorelro', '-no-pie', '-fno-PIE']),
                         (1, executable + ': failed PIE RELRO Canary'))
        self.assertEqual(call_security_check(cc, source, executable, ['-Wl,-znoexecstack', '-fstack-protector-all', '-Wl,-znorelro', '-no-pie', '-fno-PIE']),
                         (1, executable + ': failed PIE RELRO'))
        self.assertEqual(call_security_check(cc, source, executable, ['-Wl,-znoexecstack', '-fstack-protector-all', '-Wl,-znorelro', '-pie', '-fPIE']),
                         (1, executable + ': failed RELRO'))
        self.assertEqual(call_security_check(cc, source, executable, ['-Wl,-znoexecstack', '-fstack-protector-all', '-Wl,-zrelro', '-Wl,-z,now', '-pie', '-fPIE']),
                         (0, ''))

    def test_64bit_PE(self):
        source = 'test1.c'
        executable = 'test1.exe'
        cc = 'x86_64-w64-mingw32-gcc'
        write_testcode(source)

        self.assertEqual(
            call_security_check(
                cc,
                source,
                executable,
                ['-Wl,--no-nxcompat', '-Wl,--no-dynamicbase', '-Wl,--no-high-entropy-va']),
            (1,
             executable + ': failed DYNAMIC_BASE HIGH_ENTROPY_VA NX'))
        self.assertEqual(
            call_security_check(
                cc,
                source,
                executable,
                ['-Wl,--nxcompat', '-Wl,--no-dynamicbase', '-Wl,--no-high-entropy-va']),
            (1,
             executable + ': failed DYNAMIC_BASE HIGH_ENTROPY_VA'))
        self.assertEqual(
            call_security_check(
                cc, source, executable, [
                    '-Wl,--nxcompat', '-Wl,--dynamicbase', '-Wl,--no-high-entropy-va']), (1, executable + ': failed HIGH_ENTROPY_VA'))
        self.assertEqual(
            call_security_check(
                cc, source, executable, [
                    '-Wl,--nxcompat', '-Wl,--dynamicbase', '-Wl,--high-entropy-va']), (0, ''))


if __name__ == '__main__':
    unittest.main()
